These MOT failure patterns show up more often on this registration year than on similar cars of the same class, age, and mileage.
Shares below are measured across the 4,872 of 4,873 failed first attempts that recorded an odometer reading in 2025 — the subset the age-and-mileage comparison can be computed on.
Standout: Hazard warning — Switch — 6.9% of this year's failed first attempts
Recorded on 338 of those tests. It tops the table on elevation — about 23× more often than on similar cars of the same age and mileage. That is what makes it unusual for its class, which is a different question from what is most likely to fail; the buying checklist ranks by that. The full ranked list is in the table below.
| Fault pattern | Location | Failures | vs similar cars | Share of fails | Confidence |
|---|---|---|---|---|---|
|
Hazard warning — Switch
Lamps, reflectors and electrical equipment > Hazard warning > Switch
|
Any | 338 | ×23 | 6.9% | Strong |
|
Linkage pins and bushes (front)
Suspension > Anti-roll bars > Linkage pins and bushes
|
Front | 111 | ×13 | 2.3% | Strong |
|
Component mounting prescribed areas (rear)
Suspension > Component mounting prescribed areas
|
Rear | 126 | ×8.0 | 2.6% | Strong |
|
Rear fog lamp
Lamps, reflectors and electrical equipment > Front and rear fog lamps > Rear fog lamp > Rear fog lamp
|
Any | 163 | ×3.4 | 3.3% | Likely |
|
Rigid brake pipes (rear)
Brakes > Rigid brake pipes
|
Rear | 188 | ×3.3 | 3.9% | Likely |
|
Exhaust system (rear)
Body, chassis, structure > Exhaust system
|
Rear | 169 | ×3.2 | 3.5% | Likely |
|
Emissions not tested
Noise, emissions and leaks > Exhaust emissions > Spark ignition > Emissions not tested
|
Any | 117 | ×2.5 | 2.4% | Possible |
|
Catalyst emissions
Noise, emissions and leaks > Exhaust emissions > Spark ignition > Catalyst emissions
|
Any | 344 | ×2.4 | 7.1% | Possible |
Only patterns that clear minimum sample and elevation thresholds are shown (at least 20 failures and about 2.0× more often than similar cars).